'use strict';

module.exports = core;
const path = require('path')
const pkg = require('../package.json')
const log = require('@mly-cli/log')
const exec = require('@mly-cli/exec')
const constant = require('./const')
const semver = require('semver')
const colors = require('colors/safe')
const userHome = require('user-home')
const pathExists = require('path-exists').sync
const commander = require('commander')
const init = require('@mly-cli/init')

let args

const program = new commander.Command()

async function core() {
    try {
        await prepare()
        registerCommand()
    } catch (e) {
        log.error(e.message)
    }
}

async function prepare() {
  checkPkgVersion()
  checkNodeVersion()
  checkRoot()
  checkUserHome()
  // checkInputArgs()
  checkEnv()
  // await checkGlobalUpdate()
}

function registerCommand() {
    program
    .name(Object.keys(pkg.bin)[0])
    .usage('<command> [options]')
    .version(pkg.version)
    .option('-d, --debug, 是否开启调试模式', false)
    .option('-tp, --targetPath <targetPath>', '是否指定本地调试文件路径', '')
    program
    .command('init [projectName]')
    .option('-f --force', '是否强制初始化项目')
    .action(exec)
    
    program.on('option:targetPath', function() {
      process.env.CLI_TARGET_PATH = program.opts().targetPath
    })
    program.on('option:debug', function() {
        if (program.opts().debug) {
            process.env.LOG_LEVEL = 'verbose'
        } else {
            process.env.LOG_LEVEL = 'info'
        }
        log.level = process.env.LOG_LEVEL
        log.verbose('test')
    })

    program.on('command:*', function(obj) {
        const availableCommands = program.commands.map(cmd => cmd.name())
        console.log(colors.red('未知命令：' + obj.join(',')))
        if (availableCommands.length > 0) {
            console.log(colors.red('可用命令：' + availableCommands.join(',')))
        }
    })

    program.parse(process.argv)

    if(program.args && program.args.length < 1) {
        program.outputHelp()
    }
}

async function checkGlobalUpdate() {
    const currentVersion = pkg.version
    const npmName = pkg.name
    const { getNpmSemverVersion } = require('@mly-cli/get-npm-info')
    const lastVersion = await getNpmSemverVersion(currentVersion, npmName)
    if (lastVersion && semver.gt(lastVersion, currentVersion)) {
        log.warn('更新提示', colors.yellow(`请手动更新 ${npmName}, 当前版本：${currentVersion},
最新版本：${lastVersion} 更新命令：npm install -g ${npmName}`))
    }
}

function checkEnv() {
    const dotenv = require('dotenv')
    const dotenvPath = path.resolve(userHome, '.env')
    if (pathExists(dotenvPath)) {
        dotenv.config({
            path: dotenvPath
        })
    }
    createDefaultConfig()
    // log.verbose('环境变量', process.env.CLI_HOME_PATH)
}

function createDefaultConfig() {
    const cliConfig = {
        home: userHome
    }
    if (process.env.CLI_HOME) {
        cliConfig['cliHome'] = path.join(userHome, process.env.CLI_HOME)
    } else {
        cliConfig['cliHome'] = path.join(userHome, constant.DEFAULT_CLI_HOME)
    }
    process.env.CLI_HOME_PATH = cliConfig.cliHome
}

function checkInputArgs() {
    const minimist = require('minimist')
    args = minimist(process.argv.slice(2))
    checkArgs()
}

function checkArgs() {
    if (args.debug) {
        process.env.LOG_LEVEL = 'verbose'
    } else {
        process.env.LOG_LEVEL = 'info'
    }
    log.level = process.env.LOG_LEVEL
}

function checkPkgVersion() {
    log.notice('cli', pkg.version)
}

function checkNodeVersion() {
    const currentVersion = process.version
    const lowestVersion = constant.LOWEST_NODE_VERSION
    if (!semver.gte(currentVersion, lowestVersion)) {
        throw new Error(colors.red(`mly-cli 需要安装 v${lowestVersion} 以上版本的 Node.js`))
    }
}

function checkRoot() {
    const rootCheck = require('root-check')
    rootCheck()
}

function checkUserHome() {
    if (!userHome || !pathExists(userHome)) {
        throw new Error(colors.red('当前登录用户主目录不存在!'))
    }
}
